The number of binary pattern classes in the (2,n)-rectangular grid with 3 '1's and (2n-3) '0's: two patterns are in same class if one of them can be obtained by a reflection or 180-degree rotation of the other.
A225972
The number of binary pattern classes in the (2,n)-rectangular grid with 3 '1's and (2n-3) '0's: two patterns are in same class if one of them can be obtained by a reflection or 180-degree rotation of the other.
Terms
- a(0) =0a(1) =0a(2) =1a(3) =6a(4) =14a(5) =32a(6) =55a(7) =94a(8) =140a(9) =208a(10) =285a(11) =390a(12) =506a(13) =656a(14) =819a(15) =1022a(16) =1240a(17) =1504a(18) =1785a(19) =2118a(20) =2470a(21) =2880a(22) =3311a(23) =3806a(24) =4324a(25) =4912a(26) =5525a(27) =6214a(28) =6930a(29) =7728
External references
- oeis: A225972